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Science News for October 25, 2012


C'est difficile

A combination of six naturally occurring bacteria eradicates a highly contagious form of Clostridium difficile, a cause of bloating, diarrhea, and over 2,000 UK deaths in 2011. Faecal transplantation resolves symptoms and contagiousness, but the new approach aims to reduce antibiotic use.

SourceWellcome Trust Sanger Institute·JournalPLOS Pathogens·DateOct 25, 2012

DNA's double stranded stretch

Researchers used a coupled discrete wormlike chain-Ising model to simulate DNA stretching and confirm two structural transitions at forces of around 65 pN and 135 pN. Beyond 135 pN, DNA strands peel apart into single-stranded DNAs similar to those obtained through thermal denaturation.

SourceSpringer·JournalThe European Physical Journal E·DateOct 25, 2012

Triclosan needs to be monitored

Researchers from Germany and Slovakia have found that triclosan concentrations in the Elbe river basin exceeded predicted no-effect concentrations by up to a factor of twelve. Triclosan is currently not included in routine monitoring programs, despite being used extensively in personal care products and sportswear.

SourceHelmholtz Association·JournalEnvironmental Science and Pollution Research·DateOct 25, 2012

Male competition over females

Researchers at Uppsala University found that male genitalia morphology affects fertilization success in female seed beetles, driving rapid evolutionary changes. This competition among males has generated significant biological diversity and contributed to species formation.

SourceUppsala University·JournalCurrent Biology·DateOct 25, 2012

Resveratrol falls short in health benefits

A new study found that resveratrol supplementation did not improve metabolic function or prevent health problems in healthy, post-menopausal women. The study suggests that resveratrol may have a synergistic effect when combined with other compounds in red wine.

SourceWashU Medicine·JournalCell Metabolism·DateOct 25, 2012

Fishing for answers off Fukushima

A recent analysis of Japan fisheries data reveals that most fish caught off the northeast coast remain below seafood consumption limits, despite tightened regulations. However, highly contaminated demersal fish consistently show high levels of cesium contamination from the damaged nuclear power plant.

A new technique to study how myeloids become white blood cells

Researchers have developed a new technique to study how myeloids become white blood cells, providing new insights into the molecular mechanisms at work during this process. This approach offers potential improvements in treating myeloid diseases like leukemia by identifying key regulatory pathways and developing therapeutic strategies.

Measuring molecules with the naked eye

A new 'lab on a chip' developed by Brigham Young University researchers can detect extremely low concentrations of molecules, allowing for potential disease diagnosis. The device uses capillary action and receptor-lined pipes to measure molecule concentrations, providing an alternative to conventional lab equipment.

SourceBrigham Young University·JournalAnalytical Chemistry·DateOct 25, 2012

Scientists deepen genetic understanding of MS

Researchers at Simon Fraser University have identified 475,806 genetic variants in the human genome that contribute to a 30% risk of developing Multiple Sclerosis. These variants, particularly those on chromosome 6, are linked to small DNA variations that have long been associated with MS susceptibility.

SourceSimon Fraser University·JournalScientific Reports·DateOct 25, 2012

New genes discovered for adult BMI levels

A large-scale international study has identified three new gene variants associated with body mass index (BMI) levels in adults, providing fundamental insights into the biology of adult obesity. The study used a versatile gene discovery chip to detect gene variants involved in lipid-related diseases and other disorders.

SourceChildren's Hospital of Philadelphia·JournalHuman Molecular Genetics·DateOct 25, 2012

Traumatic consequences long after fall of the Berlin Wall

A recent study has found that former political prisoners in East Germany continue to experience post-traumatic stress disorder (PTSD) 15 years after their imprisonment. The study, which followed up with 78 men and 15 women who were initially interviewed in the mid-1990s, revealed that PTSD affects about a third of those studied.

SourceUniversity of Zurich·JournalDer Nervenarzt·DateOct 25, 2012

The Biggest Loser a big turnoff

Researchers at the University of Alberta found that extreme exercise depictions on TV shows like The Biggest Loser can create negative attitudes towards physical activity. Watching a clip from the show raised participants' worst possible thoughts about exercise, counteracting public health efforts to encourage more active lifestyles.

SourceUniversity of Alberta·JournalAmerican Journal of Health Behavior·DateOct 25, 2012

For the Milky Way, it's snack time

Researchers have discovered a narrow stellar stream in the southern Galactic sky, believed to be the remnant of an ancient star cluster being ingested by the Milky Way. This finding provides new insight into how galaxies form and evolve through hierarchical merging of smaller galaxies and star clusters.

SourceYale University·JournalThe Astrophysical Journal Letters·DateOct 25, 2012

Anesthesia drugs really do put us to sleep

Researchers found that anesthesia drugs like isoflurane boost activity in a part of the brain that increases during natural sleep, forcing important sleep circuits to fire. This finding could lead to a deeper understanding of how anesthetics work and potentially improve treatment options for patients.

SourceCell Press·JournalCurrent Biology·DateOct 25, 2012

Individual gene differences can be tested in zebrafish

Researchers used zebrafish to test genetic mutations that affect human skin color and found that some mutations had no effect on the fish's skin color. This approach may be useful in identifying which genetic mutations can be ignored and which require attention, potentially aiding personalized medicine.

SourcePenn State·JournalPLOS ONE·DateOct 25, 2012

Plastic and Reconstructive Surgery Journal announces global expansion initiatives

The Plastic and Reconstructive Surgery Journal is expanding its reach to the international plastic surgery community through a publishing partnership with Revista Brasileira de Cirurgia Plastica. The journal will exchange content with RBCP, allowing for easy access to research advances among Brazilian leaders. A new open-access title, ...

SourceWolters Kluwer Health·JournalPlastic & Reconstructive Surgery·DateOct 25, 2012

Journal of Public Health Management and Practice now available on the iPad

The Journal of Public Health Management and Practice is now available on the iPad, providing convenient access to critical public health information. The journal's November/December special issue focuses on public health services and systems research, exploring its impact on organization, financing, and delivery of public health services.

SourceWolters Kluwer Health·JournalJournal of Public Health Management and Practice·DateOct 25, 2012